Chair for concrete-reenforcing bars



July 13 1926. 1,592,157

J. REYNOLDS ET AL V CHAIR FOR CONCRETE REENFORCING BARS Filed OOt. 61924 noentozs Fatented July 13, 1926.

FATEQFET @FFEQE.

JAMES REYNOLDS AND JOE-II? "WILSON, 0F CLEVELAND, OHIO.

CHAIR FOR GONCBETE-REENFORCENG BARS.

Application filed October 6, 1924.. Serial No. 741,805.

This invention relates to supports or chairs for concrete reenforcingbars. The general object of the invention is to provide a simple, strongand easily manufactured re enforcing bar support.

It is important in concrete constructions by reason of the necessity forcomplying with the usual building codes that certain relations betweeneach of the reenforcing bars may be maintained; It has been ourexperience that a great many supports now used are so made that the barsare not held in their originalposition when subjected to the forcesresulting from flowing and tamping the concrete.

Further objects include the-provision of a chair. for supportingreenforcing bars each of which may be formed of bent members engagingeach other in such a manner that the chair may easily be put togetherand in which there will be the least likelihood of the members becomingdisengaged while serving to support a reenforcing bar.

Another object of the invention is to provide a support formed of loopedrods in which the weight of the bar to be supported will be equalizedover. all the legs of the chair. Our invention moreover, contemplatesthe provision of depending loops on at least one of the memberscomprising the chair from which the ends of a reenforcing bar may besuspended.

Other objects and features will become apparent in the furtherdescription which pertains to the accompanying drawings, wherein wehaveillustrated the preferred embodiment of our invention. The essentialnovel characteristics will be set forth in the claims.

In the'drawings, Fig. 1 is a perspective of our supporting chair; Fig. 2is a side eleva tion thereof showing a bar in cross section supportedthereon; Fig. 3 is a plan view of the top of the chair; Fig. 4 is across section as indicated by the lines 4-4 on Figs. 2 and 3; Fig. 5 isa fragmentary side elevation of a modified form of chair; Fig. 6 is adiagrammatic view showing the use of the chair in supporting aconventional form of reenforcing bar or rod.

Referring again to the drawings and designating the various parts byreference characters, it will be seen that the chair consists of we l pd and tm m r n 2,

the free ends of which form the legs 3, 4t, 5 and 6. The legs convergetowards the top of the chair to provide for sideward bracing. At the topof the chair each of the members are bent into substantially open loops,that of the memberl being designated 7, and that of the member 2 beingin dicated at 8. Each of the loops are bent to form when engaging eachother a substantially horizontal table. 7

We do not propose to limit ourselves to the exact formation of theseloops, but in the form of the invention shown in the bends are asfollows. The loop 7 is formed about as shown in Fig. 3, open as at 9 andwith the ends bent downwardly as at 10, Fig. 2 at approximately a rightangle. The

closed end of the loop 11, may then be bent upward as shown to formacradle effect when assembled with the other looped memher, though wewould consider it within the spirit of our, invention were the loop 7 tobe made generally flat and horizontal when assembled.

In forming the loop 8 of the member 2, the closed end 14 issubstantially straight for a distance corresponding to that be-' tweenthe sides of the loop 7 about as shown then rearwardly in a generousloop as shown by the broken lines 15 This loop is preferably bentdownwardly to engage the sides of the loop 7 as shown in Figs. 2 and 4.This downturned portion lends stability to the chair by preventing thedisplacement of one loop relative to the other. The portion 15 may beformed so that a bar B resting on the assembled chair as shown in Fig. 2rests both on the members forming the loop 7 and the loop 8 whereby theload is substantially equalized over allthe legs. The free ends of thelooped member 2 are brought together as at 16 to underlie the slightlyraised region 11 of the other loop and bent downwardly as at 17 to formthe legs 5 and 6. It is preferable to form the members at 18 so that asubstantially horizontal region will be formed at 18 upon which thebridging portion 11 may rest. It is within the spirit of our inventionto form a slight depression at this point, to more se curely hold theclosed end of the loop 7 in place.

In Fig. 6, we have shown a pair of chairs indicated at C and C restingupon false;

work P which may for illustration be considered as extending betweendepressions H for the head plate of a column in a concrete buildingunder construction. A trusscd bar or reentorcing member B is shown assupported at its upwardly turned ends upon a raising bar 13 extendingtransversely oi the member 13 and resting across the chairs.

If desired we may point the ends of the legs as, shown in Fig. 2 at 20so that when the chairs are placed, these ends may be thrust slightlyinto the false-work to prevent lateral slipping of the chairs while theconcrete is being tamped about the reenforcing members.

In Fig. 5 we have shown a modified construction of chair in which atleast one of the loops extend downwardly far enough to receive the endof a rceni orcing bar. Such a construction would be very useful to holdthe reeut'orcing bars in exact. position, while the expense of formingthe chairs would not be materially increased. The two parts forn'iingthe chairs may be very easily put together or taken apart by simplyswinging the legs of each member towards each other until the loops areseparated, then bodily turning one member with reference to the other asufiicient distance to allow the loop 8 to be withdrawn through the loop7. I

It will be seen that we have provided a strong, cheaply manufactured andeasily assembled chair for the purpose stated. which may be easily madefrom rods of sutiicient size or diameter to support the ends ofrcent'orcing bars such as are generally user None oi the bends necessaryto term the loops are sharp and hence the strength oi the materialtoru'iing the chair is not impaired.

Having thus described our invention. we claim I l. A chair forsupporting reeutorcing bar: formed of two members each having downwardly extending leg portions and each havin; loops, each of the loopshaving a portion (Wei-lying the other loop to form a support adapted tosustain a weight.

:3. In combination a pair of separate members each having downwardlyextending leg portions and loops which engage each other to hold themembers together in upright position. one 01 said loops havingoppositely disposed stretches depressed from the general plane of saidloops to provide a two point cradlelike support for a building menu ber.

3. A reentorciug bar chair comprising in combination a pair ofinterlocking members adapted to be assembled without distortion andhandled separately. said members each having a portion which overliesthe other in a substantially horizontal plane, and downwardly extendinglegs carried by each bling the loops together, each loop terminating indownwardly extending legs disposed at diverging angles.

In a chair for supporting concrete rc enforcing bars. a pair of membersformed of ductile material and adapted to engage a floor, a. loop formedin each of the members, said loops being adapted to engage each other toform a rigid support, the closed region of one loop being formed tooverlie the open side oi the other loop and one of said loops having adownturned portion adapted to lie adjacent the side of the other loop.

(3. In a chair for supporting concrete bars. a pair of rods adapted toengage a floor, loops formed in each of said rods adapted to interlockto form a rigid support, a portior of each loop being arranged to restacross the other at two points, one of said 100 s having downturnedportions adjacent the side oi the other loop whereby the rigidity of thechair is maintained when supporting a bar.

7. In a device of the character described, a pair of looped membershaving downturnod ends or legs, said loops mutually overlying each otherso that a rigid support is formed at the top of the legs, one of saidloops having depending port-ion lying adjacent a portion of the otherloop to maintain the engagen'ient. the loops having their uppersupporting surfaces in sul'istantially the same horizontal plane.

8. In a device of the character described. a pair of looped members,said loops terminating in downwardly extending legs, the loops mutuallyoverlying to form a rigid support at the top of the legs, and one ofsaid loops having a depending region adapt ed to receive and suspend abar member.

9. In combination, a pair of horizontally disposed looped rods eachengaging the other to term a support. each loop overlying the other andsaid loops having upwardly e. tending humps at the overlying portionwhereby a supporting cradle is formed iutermediate the bumps.

10. A chair for supporting concrete reentorcing bars comprising a pairof separable members formed with their upper portions extending inwardlytoward each other and each having a portion thereof overlying the othermember, the lower portion of each member extending downwardly oppositeits overlying portion to form legs to support the chair.

11. A chair for supporting concrete reenforcing bars comprising a pairof disengagably lnterlooking members each having a horizontally disposedsupporting portion and a downwardly extending .leg portion, members oneach of the horlzontally chsposed ortions arran ed to overlie the otherhorizontally disposed portion, the overlying JAMES REYNOLDS. JOHNWILSON.

